<span>-x=4(6+x)
-x=24+4x
4x+x=-24
5x=-24
x=-24/5
x=-4,8
Ответ:</span>-4,8
2х - 6х + 5 = 45
-4х= 45-5
-4х=40
х=40:(-4х)
х=-10
ответ -10
1) x=5y+2
2(5y+2)-y=7
10y+4-y=7
9y=3
y=1/3 ===> x= 5*1/3=5/3
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